Seoul Weather in December
In December, Seoul averages a high of 4°C (39°F) and a low of -4°C (25°F), from 46 years of daily records (1971–2026).
4°C
Average high
39°F
-4°C
Average low
25°F
18°C
Record high
64°F · December 3, 2004
-18°C
Record low
0°F · December 27, 1976
What December Is Like in Seoul
- The coldest December reading, -18°C (0°F) on December 27, 1976, has not been matched in 50 years.
- On average, 23 nights in December drop below freezing.
- The warmest December in the record was 1977; the coldest was 2012.
At least 1 mm of rain falls on 19% of December days, and the month averages 24 mm in total.
Warmest: 1998 (6.6°C)Latest: 2025 (4.7°C)10-year averageLong-run average (4.1°C)
Look Up a Day in December
See the weather in Seoul on any December date, year by year.
Source: NOAA GHCN-Daily, Seoul City (1973–2025); Incheon (1971–2026). Averages cover 1971–2026. How we compute this